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针对不同吸附模型对无烟煤阶段煤样吸附的适用性问题,在SPSS18.0平台上对程庄矿无烟煤吸附试验数据进行拟合,基于分子间作用力,从微观上对比研究Langmuir-Freundlich等6个模型的适用性。研究结果表明:(1)基于分子间作用力对煤样吸附适用性的研究是可靠有效的;(2)三参数模型的拟合效果优于二参数模型;(3)无烟煤阶段采用Freundlich吸附模型拟合是不适宜的,采用D-A模型效果最好;(4)依据超临界状态饱和蒸汽压所估算的饱和吸附量偏大,表明推算饱和蒸汽压的经验公式存在缺陷;(5)针对不同吸附模型对其它煤阶煤样吸附的适用性问题应该进一步研究。研究结果可为煤层气储量分析及涌出预测提供理论依据或参考。
According to the applicability of different adsorption models to the anthracite coal sample adsorption, the data of anthracite adsorption in Chengzhuang coal mine were fit on the SPSS18.0 platform. Based on the intermolecular forces, the six Langmuir-Freundlich et al. Applicability of the model. The results show that: (1) The applicability of intermolecular forces to the adsorption of coal samples is reliable and effective; (2) the fitting effect of the three-parameter model is better than that of the two-parameter model; (3) the Freundlich adsorption model (4) the saturated adsorption capacity estimated by the saturated vapor pressure in the supercritical state is too large, which indicates that the empirical formula for estimating the saturated vapor pressure has defects. (5) According to the different adsorption The applicability of the model to other coal rank coal samples should be further studied. The results can provide theoretical basis or reference for CBM reserves analysis and prediction of emission.